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ISSN - 10637761, EISSN - 10906509, Journal of Experimental and Theoretical Physics, 2003, vol. 96, p. 789-800

Analysis of e+e- → π+π -π+π- and e+e- → π+π-π0π0 processes in the energy range of √s = 0.98-1.38 GeV in experiments with a spherical neutral detector

Achasov M. N., Beloborodov K. I., Berdyugin A. V., Bogdanchikov A. G., Bozhenok A. V., Bukin D. A., Valishev A. A., Vasiljev A. V., Golubev V. B., Dimova T. V., Druzhinin V. P., Ivanchenko V. N., Korol A. A., Koshuba S. V., Nesterenko I. N., Pakhtusova E. V., Perevedentsev E. A., Pyata E. A., Salnikov A. A., Skrinsky A. N., Serednyakov S. I., Silagadze Z. K., Shary V. V., Shatunov Yu M.

The cross sections of the e+e- → π+π-π+π-, e +e- → π+π -π0π0, and e+e- → ωπ → π+π -π0π0 processes, as well as the e +e- → π+π -π0π0 process with subtracted contribution of the ωπ intermediate state, are measured in experiments with a spherical neutral detector on the VEPP-2M collider in the energy range 0.98-1.38 GeV. About 41000 events of the e+e- → π+π-π+π- process and more than 54000 events of the e+e- → π+π-π0π0 process have been selected in experiment. The statistical error in determining the cross section is 2-20%, while the systematic error is 7 and 8%. © 2003 MAIK "Nauka/Interperiodica".